Track-relay for signal systems.



(a. s. GRAY. TRACK RELAY FOR SiGNAL SYSTEMS.

APPLICATION FILED SEPT-1,1911.

Patented May 11, 1915.

S MS Q Witnesses Attorneys hr. snares refi l? 7 ICE,

GARDNER B. GRAY, OF PITTSBURGH, PENNSYLVANIA, ASISIGNOR, BY MESNEASSIGN- MENTS, T0 AUTOMATIC TRAIN CONTROL & SIGNAL COMPANY, OFPITTSBURGH, PENNSYLVANIA, A. CORPORATION OF DELAWARE.

Specification of Letters Patent.

Yatented May 11, 1915.

Application filed September 1, 1911. Serial No. 647,278.

To all (If/L011] it may concern.

Be it known that I, Gambian B. (irRAY, a citizen of the United States,residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented a new and useful 'lraek-Relay for SignalSystems, of which the following is a specification.

The present invention relates to improvements in track relays, and theprimary objectof this invention is the provision or production of acompound relay that is adapted to be disposed in a. loop circuit aroundthe insulated joint, as set Forth in applicants former Patent No.909,083, granted to him January 5, 1909. This compound. relay is used inplace of the regular line relay and is made up of two neutral re layswhich work in combination to control a polarity reversing switch, one ofsaid relays being constantly energized with its polarity in the samedirection, the other having itsiolarit reversed accordiin to certaincon-i that changes in the precise embodiment of I invention hereindisclosed can be made within the scope of what is claimed withoutdeparting from the spirit of the invention.

in the, drawlugs-Jfigure 1 is an enlarged detail view showing the coreends ol. therelays and the switch operated thereby. Fig. 2 is a. view taken on line 7---7 of Fig. i looking: lay the directionv ol' the arrow.

5 indicates a plate for supporting the cells: A, ll and (l which providetwo neutral magnets or relays, the coils A A constitutinc one of themagnets and the coils ll C constituting the other of said magnets. coilsof each magnet are arranged side by side in parallel relation upon theupper face of the plate. The block 26 is secured to one pole of themagnet A A and is provided With an orifice "27, in which an end 31 ofthe armature 32 is pivoted by means of the spindie 30. The spindle isremovably and adjustably held in position in said orifice by the plate28 and the adjusting screw 29.

Blocks F and (l are secured to the cores l3 respectivel of the magnet BC and are formed with the arms 35 and 37 which extend in spaced relationparallel with said supporting, plate 5 and toward block 26 of the magnetA A. i'hljustably carried in the terminals of said arms 33 and 37 arethe contacts ill and 36, respectively, between which the tree end of thearmature 352 cxtcmls Depending from the supporting plate 5 .is the plate42 which supports below the armature 32 the insulating block 41 havingrlongitudinally formed therein the slot 4-1. Secured to the lower'tace ofthe block ll arid on opposite sides of the slot -11 are the series ofposts and i6 which carry pairs of carbon contacts 43 and. ii respectively. An insulating strip 39 is trans vcrsely secured to thearinature'32 by the screw 38 and has the contact arms 40 and 40 suitablysecured to the opposite end thereof. These contact arms 40 and 40''extend substantially at right angles to the armature 82 and through theslot 41' and between the contacts 43 and ll.

(urrent through the magnet A A is always of the same polarity and thearmature 32 is polarized therefrom. Cl'lllclli) through the mz'ignet B Uis adapted to be reversed thri'iugh the existence of certain conditionsand thus oscillates the armature between the contact points and 36. Asthe armature 32 is swung to or fro by the changing of the polarity inthe magnet B (l, the contact arms 40 and 40 are moved to engage with there.- spective sets of contacts 43 and 44' to close certain circuitsthercthrough according to the movement of the armature 32.

that is claimed is:

1, The combination of two magnets, a metal block connected to one of thepoles of one ol said ma gnets, an armature pivoted in said block andhaving its free end extended toward the poles of the other of saidmagnets. :1 metal block carried by each of the poles ol the secondmagnet, terminals iormed on each of said blocks and disposed side byside in spaced relation to provide a space for the reception oi the freeend of the armature, a plurality of depending contact arms carried byand insulated from the armature, at block of insulation through whichsaid contact arms project and within which they are permitted tooscillate, and a plurality of contact goints carried by and projectingbelow the lock of insulation and in the path to be engaged by thecontact arms, the change of po arity of the poles of said second magnetactuating the armature tocause it to move toward, one or the other ofsaid terminals and consequently actuate the contact arms to engageeither set of contact points.

2. ihe combination of a supporting memher, an armature carried on saidsupporting member, electromagnetic means on the support for influencingsaid armature and adapted to move the same in opposite direc- 'tions, aplate extending from said supporting member, an insulatin block securedto said plate and having a s ot therein, sets of contact points mountedto the outer face of said block on opposite sides of the slot there in,contact arms secured to said armature andinsulated therefrom andextended through said slot to engage With certain sets of contact pointsto close certain circuits accordin 3. T e combination of relays havingthe coils of each arranged side by side, an armature having an endpivote to one of the poles of one of said relays and being polarizedthereby, arms extended from the poles of the other of said relays inspaced rela tion, the free end of said armature bein extended betweensaid extended arms and be-- ing adapted to be influenced by the polarityof the current therethrough so as to move therebetween, contact pointsarranged in spaced relation with said armature, and conto the movementof said armature.

tact arms secured to the armature and insulated therefrom and to engagewith certain of said contact points according to the movement of thearmature.

In testimony that llglaim the foregoing as my own, I have hereto affixedmy signature in the presence of two Witnesses.

GARDNER B. GRAY.

Witnesses: I ERNEST PAYNE, GUY P. THURBER.

